Image Processing Apparatus, Image Processing Method, and Storage Medium for Generating a Mask Image

1. An image processing apparatus, comprising: a computer executing instructions that, when executed by the computer, cause the computer to function as: an acquiring unit configured to acquire a background image and a captured image; an extraction unit configured to extract, from the captured image, an object region corresponding to a predetermined object; a first generation unit configured to generate a mask image for privacy protection on the object region; and a second generation unit configured to generate a composite image by combining the mask image generated by the first generation unit and the background image acquired by the acquiring unit, wherein the first generation unit extracts a plurality of pieces of color information from the background image, sets color information indicating single color based on the plurality of pieces of color information, and generates the mask image based on the set color information.

2. The image processing apparatus according to claim 1 , wherein the first generation unit sets color information indicating a single color that is different from a color most used in a region of the background image corresponding to the object region from among colors indicated by the plurality of pieces of color information.

3. The image processing apparatus according to claim 1 , further comprising an output unit configured to output the composite image.

4. The image processing apparatus according to claim 1 , wherein the first generation unit generates the mask image by masking the object region based on the single color indicated by the set color information.

5. An image processing method, comprising: acquiring a background image and a captured image; extracting an object region corresponding to a predetermined object from the captured image; firstly generating a mask image for privacy protection on the object region; and secondly generating a composite image by combining the mask image and the background image, wherein the firstly generating extracts a plurality of pieces of color information from the background image, sets color information indicating single color based on the plurality of pieces of color information, and generates the mask image based on the set color information.

6. A non-transitory computer-readable storage medium storing a program that causes a computer execute an image processing method, the image processing method comprising: acquiring a background image and a captured image; extracting an object region corresponding to a predetermined object from the captured image; firstly generating a mask image for privacy protection on the object region; and secondly generating a composite image by combining the mask image and the background image, wherein the firstly generating extracts a plurality of pieces of color information from the background image, sets color information indicating single color based on the plurality of pieces of color information, and generates the mask image based on the set color information.

7. An image processing apparatus, comprising: a computer executing instructions that, when executed by the computer, cause the computer to function as: an acquiring unit configured to acquire a background image and a target image which is captured by an imaging unit; an extraction unit configured to extract, from the target image, an object region corresponding to a predetermined object; a first generation unit configured to generate a mask image for privacy protection on the object region; and a second generation unit configured to generate a composite image by combining the mask image generated by the first generation unit and the background image acquired by the acquiring unit, wherein the first generation unit generates the mask image, for the privacy protection on the object region, based on first color information about the background image and second color information used for generating the mask image for the privacy protection on the object region extracted from a previous image of the target image.

8. The image processing apparatus according to claim 7 , wherein the first color information about the background image includes first color information about the background image corresponding to the object region extracted from the target image, wherein, if the first color information about the background image corresponding to the object region extracted from the target image is different from the second color information, the first generation unit generates the mask image, for the privacy protection on the object region extracted from the target image, by using the second color information, and wherein, if the first color information about the background image corresponding to the object region extracted from the target image is not different from the second color information, the first generation unit generates the mask image, for the privacy protection on the object region extracted from the target image, by using third color information different from the first color information about the background image corresponding to the object region extracted from the target image.

9. The image processing apparatus according to claim 8 , wherein, if the first color information about the background image corresponding to the object region extracted from the target image is different from the second color information, the first generation unit generates the mask image by masking the object region, extracted from the target image, based on the second color information, and wherein, if the first color information about the background image corresponding to the object region extracted from the target image is not different from the second color information, the first generation unit generates the mask image by masking the object region, extracted from the target image, based on the third color information.

10. An image processing apparatus, comprising: a computer executing instructions that, when executed by the computer, cause the computer to function as: an acquiring unit configured to acquire a background image and a target image which is captured by an imaging unit; an extraction unit configured to extract, from the target image, an object region corresponding to a predetermined object; a first generation unit configured to generate a mask image for privacy protection on the object region; a second generation unit configured to generate a composite image by combining the mask image generated by the first generation unit and the background image acquired by the acquiring unit; and an estimation unit configured to estimate a region corresponding to the predetermined object in a subsequent image of the target image, wherein the first generation unit generates the mask image, for the privacy protection on the object region, based on first color information about the background image corresponding to the object region and second color information about the background image corresponding to the estimated region estimated by the estimation unit.

11. The image processing apparatus according to claim 10 , wherein the first generation unit generates the mask image based on third color information which is different from the first color information and the second color information.

12. The image processing apparatus according to claim 11 , wherein the first generation unit generates the mask image by masking the object region, extracted from the target image, based on the third color information.

13. An image processing method, comprising: acquiring a background image and a target image which is captured by an imaging unit; extracting, from the target image, an object region corresponding to a predetermined object; firstly generating a mask image for privacy protection on the object region; and secondly generating a composite image by combining the mask image and the background image, wherein the firstly generating generates the mask image, for the privacy protection on the object region, based on first color information about the background image and second color information used for generating the mask image for the privacy protection on the object region extracted from a previous image of the target image.

14. A non-transitory computer-readable storage medium storing a program that causes a computer execute an image processing method, the image processing method comprising: acquiring a background image and a target image which is captured by an imaging unit; extracting, from the target image, an object region corresponding to a predetermined object; firstly generating a mask image for privacy protection on the object region; and secondly generating a composite image by combining the mask image and the background image, wherein the firstly generating generates the mask image, for the privacy protection on the object region, based on first color information about the background image and second color information used for generating the mask image for the privacy protection on the object region extracted from a previous image of the target image.

15. An image processing method, comprising: acquiring a background image and a target image which is captured by an imaging unit; extracting, from the target image, an object region corresponding to a predetermined object; firstly generating a mask image for privacy protection on the object region; secondly generating a composite image by combining the mask image and the background image; and estimating a region corresponding to the predetermined object in a subsequent image of the target image; wherein the firstly generating generates the mask image, for the privacy protection on the object region, based on first color information about the background image corresponding to the object region and second color information about the background image corresponding to the estimated region estimated in the estimating.

16. A non-transitory computer-readable storage medium storing a program that causes a computer execute an image processing method, the image processing method comprising: acquiring a background image and a target image which is captured by an imaging unit; extracting, from the target image, an object region corresponding to a predetermined object; firstly generating a mask image for privacy protection on the object region; secondly generating a composite image by combining the mask image and the background image; and estimating a region corresponding to the predetermined object in a subsequent image of the target image; wherein the firstly generating generates the mask image, for the privacy protection on the object region, based on first color information about the background image corresponding to the object region and second color information about the background image corresponding to the estimated region estimated in the estimating.